Hernández-Jiménez Miriam, Revilla Isabel, Arce Lourdes, Cardador María José, Ríos-Reina Rocío, González-Martín Inmaculada, Vivar-Quintana Ana María
Food Technology, Universidad de Salamanca, E.P.S. de Zamora, Avda. Requejo 33, 49022 Zamora, Spain.
Department of Analytical Chemistry, Institute of Fine Chemistry and Nanochemistry, Marie Curie Annex Building, University of Córdoba, Campus de Rabanales, E-14071 Córdoba, Spain.
Animals (Basel). 2021 Sep 11;11(9):2671. doi: 10.3390/ani11092671.
The potential of two complementary analytical techniques (near infrared spectroscopy, NIRS and gas chromatography-ion mobility spectrometry, GC-IMS) was used to establish the time that Iberian pigs have been fed on acorns and pasture and to verify their genetic purity. For both techniques it was neither necessary to carry out any chemical treatment in advance nor to identify individual compounds. The results showed that both the NIR spectrum and the spectral fingerprint obtained by GC-IMS were affected by the time that the Iberian pig feeds on natural resources. High percentages of correct classification were achieved in the calibration for both techniques: >98% for the days of and >96% for the breed by NIRS and >99% for the days of and >98% for the breed by GC-IMS. The results obtained showed that NIR spectra taken from intact samples is a quick classification method according to the time of and breed.
利用两种互补分析技术（近红外光谱法，NIRS和气相色谱-离子迁移谱法，GC-IMS）的潜力来确定伊比利亚猪食用橡子和牧草的时间，并验证其遗传纯度。对于这两种技术，既无需事先进行任何化学处理，也无需鉴定单个化合物。结果表明，NIRS光谱和GC-IMS获得的光谱指纹均受伊比利亚猪食用自然资源时间的影响。两种技术在校准中均实现了高百分比的正确分类：NIRS对天数的正确分类率>98%，对品种的正确分类率>96%；GC-IMS对天数的正确分类率>99%，对品种的正确分类率>98%。所得结果表明，从完整样品获取的NIRS光谱是一种根据食用时间和品种进行快速分类的方法。
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